TECHOTLALATZIN (tetch-ot-lah-lah-tseen'), king of Texcoco, d. in 1409. He was the youngest son of King Quinatzin, whom he succeeded on the throne in 1357. During his reign one of his dependent chiefs, Tzompan, cacique of Xaltocan, revolted against his rule; but he asked assistance from King Huitzilihuitl of Mexico, and with his aid routed the rebel. From that date a mutual alliance began between the monarchies of Texcoco, Tlaltelolco, and Chapultepec. He was succeeded by his son Ixtlilxochitl I.